Freshly Rebuilt $1200 Big Bore Racing Dirt Bike Won't Start
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- Опубліковано 23 сер 2024
- I buy a 2001 Big Bore Yamaha yz250f racing dirt bike, rebuild it and it won't start. #Yamaha, #BigBore,
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I definitely think it's the hot cams. Probably to aggressive of a cam causing lack of vacuum while kicking it. It needs higher rpm to create enough vacuum which would explain why it can be bump started. Put stock cams in it
Seems like a good answer but along with other tweeks. Complex?
The accelerator pump should make up the difference
Cam timing is the problem 2 much advance on that slotted gear I'd move it back 10 degrees and try it these cams are meant to run with stock valve train not that aggressive I promise lol
Thank you for the suggestion! I appreciate it!
@@jamesprice3403 I wondered why the adjustable gear wasn't zeroed prior to going back together. Too much advance or retard and... Kick til the cows come home!
With regard to push starting on your driveway you might want to try a higher gear and I found that it helps increase traction if you jump higher and drop the clutch just as your butt hits the seat rather than after you are settled in coasting. Lastly hook up a harness to the cute little dog and let him pull you....he clearly has excess energy!
Thanks for the suggestion! I appreciate it!
Vinnie does have a lot of energy!
Higher gear and actually get on the bike properly before you try. Stand up and bounce down onto the seat as you release the clutch. Much easier
Just a thought would the piston be giving displacement problems whilst firing or simply the crank rod itself or crank shaft cause your timing is impeccable
I own an 04 WR250F and have learned more about my bike in the last 2 videos then I have in owning my bike for 6 months. You rock.
That means a lot! Thank you for watching the videos! I appreciate it! I am glad that they have helped!
Is it just me or does the sounds the paper towels makes when he wipes down stuff give y’all cold chills too? Lol it’s kinda like scratching something on a chalk board for me lol
Killin me to.....
Shop towels are more coarse than paper towels
Yeah
His mic is exaggerating the sound but yeah it's like nails on a chalkboard
Yeah, almost as bad as the fresh piston and ring going into a dry cylinder.😂😂😂
I admire your patience and I am totally confident that you will get that bike starting and running great
Thank you! That means a lot! Thank you for watching!
That shiny ring on the old piston was probably caused by a way too narrow squish or even the piston hitting the head. Always check the squish with aftermarket pistons. It is normally done with solder tin. You can stick it on to the piston edge with greas and do a dry fit of the head with the old head gasket (head bolts torqued to specs). Turn the engine over by hand, remove the head and measure the thickness of the compressed solder tin. Adjust the squish with a (probably) thicker bottom cylinder gasket
thats on 2strokes
@@bryce6946 also on 4stroke. On Every combustion piston engine
@@bryce6946 ua-cam.com/video/_QRvgdbq8ns/v-deo.html
Thank you for the suggestion! I appreciate it!
^^^^^^^what he said. 👍🏼. Love your vids btw!!
at 30:00 you started it, then changed the jetting at 33:40. Imo its a air/fuel ratio problem. Don't give up on it ! great video :)
🤔reminded me of trying to time by ear, hit the spot, a little more - nope
Thank you for watching! I appreciate it so much!
#1 I'd be suspicious of that cam, and might consider putting a stock one back in (or change the timing on that Hot Cam just for testing purposes). Next I'd connect a clamp on the plug wire and test the actual ignition timing to TDC. What if the coil/magnet were set incorrectly and the timing was off (need a scope to test that, and not sure if you have one.... I find them invaluable). The fly in the ointment is it sounded strong when it was running though.
In general Ignition timing and cam timing are 2 different things. You dont get cam timing from a timing light.
Scopes are awesome. I want a pico so bad. I do have a snapon modis and a micsig. The micsig is good for the money. He would alsmost have to have a known good bike to test from though.
There just hard to start bikes I had a big bore kit and stage 3 everything was perfect on it and it just would take a 100 kicks to start the. Even more to restart those older 2000-05 models aren’t very good
I wouldn’t say it would be timing or ignition as it ran good once running.
I would do one size pilot changes at a time. One size makes a big difference. It may need a bigger starter jet, needle clip position adjustment, and it wont hurt to check the ac pump squirt timing
If it doesn't at least pop when gas is shot down the carb changing jets all day will do nothing.
Thank you for the suggestion!
I know that my 2001 yz426f had a certain starting process and if you didn't do it just right it would never start, but also that cam looks to be adjusted a little much maybe adjust it to the middle of the slot
Yeah I got a 2001 wr426f and there’s a method to the madness. You can kick it over 100 times and it won’t do anything. But if you twist the throttle once. Slowly kick it over until you find that resistance & then kick it hard it starts first or second kick usually every time.
@@baileyforrester7 yep exactly right
Thank you for the suggestion!
Sounds like it could be the decompression mechanism, not releasing at the right time due to the big bore kit maybe. Had the same problem with my raptor 660 with the BB kit, had to order 2 new carbs as well as change the head gadket thickness.
That's what I was thinking too.
like he said, it has a Hotcam so there should not be any decompression mech.
Yes the head gasket thickness. Could be increased?
@@banana82728 it’s only got an intake hot cam
@@07144 the intake cam is where the de compression mech goes when stock. Hotcam just makes it harder to start.
Decomp, and hot cams. 🔥 I'd burn them both to the ground for how much time I spent chasing that same issue. Run stock cams and a new decomp.
Might not be the issue, but on a whole I agree!
love your videos man, just got heavily into bikes again since i was a kid about 3 years ago. ive learned a ton on how to maintain and work on bikes from your channel. huge thanks, keep up the great content!
Same with me and couldn't agree more, he always puts out great content and does it in a way for us viewers to actually learn new things which has been huge for me!!
That means a lot! I am glad that you enjoy the videos, and find them helpful! Thank you for watching! I appreciate it!
@@2vintage did u find out the problem I have a 2008 doing the same thing😢
Maybe try adjusting the intake timing since is adjustable. It looked like you had it turned all the way to once side of the slot in the gear. Try it in the center?
Bingo, The Hotcams were never Degreed properly.
Amateur engine builder sold it to another Amateur engine builder.
yep yep that is what I thought right off, the timing is off, and more than likely the fuel to air ratio is off now.
Thank you for the suggestion!
When bump starting jump on the back of the seat to put a lot of weight and traction on that back tire
Next time you kick on it try this, no throttle what so ever sometimes it's best to put your hand on the bars instead of the throttle to avoid temptation lol. Slowly turn the engine 3 or 4 times. Then find compression, after you find compression ease down on the kick starter until it gives a notch and gets tight again. Then let off the kick starter let it return to home position, now give it a good hard kick and it should fire after a few times of doing this repetition. That is the only way I can get my 01 to fire up. If I kick it like I mention her it fires the first kick or two. Hope this helps man. Love your content, I watch all your videos. You have taught me alot. Good luck.👍
Thank you, that means a lot! I appreciate the suggestion!
I had a similar issue w a RM250. Made spark and got fuel... The cdi box was the issue, it was failing. Also, check to see if the pulsar pickup (stator pickup) has a slot for the timing adjustment, if so, make slight adjuments either advancing or retarding the timing. I've been there bud, these types of issues can be extremely frustrating. Good luck!
It definitely can be frustrating! Thank you for the suggestion! I appreciate it!
the problem is with the compression release on those bikes. That's why it only bump starts. They don't come with an auto compression release on the cam. If you kick it like all the newer 4 stroke it will flood out on you. Before you kick it make sure you're on the compression stroke. The older bikes like that yzf have a compression release lever on the handle bar area. Look at the front of the head on the right side you should see a lever where the cable attaches to.
It drives me crazy to watch him pump the throttle like that I had an 02 250f and learned the hard way those have to be TDC and no throttle and they shouldn't have an auto decomp like u said there's a manual lever on left handle bar that releases compression but idk if the hot cam replaces that... no throttle and cannot kick it over like a 2smoker
I had a 02 yzf 250 and replaced the stock cam with a few years newer that had the automatic decompression designed on the cam. Solved all my issues with starting those bikes.
Thank you for the suggestion!
@@2vintage I would second the earlier reply that these older YZ bikes get flooded super easy. I have a 2003 YZ450 and found that you can only give it 2 or 3 throttle twists prior to starting and then no more after that. If it won't start it's probably flooded, pull in the "hot start" lever on the left side of the bar and gently rotate the motor with the kicker a half dozen times to clear out the cylinder. Then find TDC and kick it without throttle twists. I'm betting you could bump start it because it wasn't getting any throttle from you when it rotated. Love the channel BTW
Runs exactly like my 250f. It's the carb is super lean...the compression blows out the spark. Tighten the plug gap and put a known good carb from any running 250.
I had a 2014 YZF250(last year of the carb bikes), It would NEVER start if I twisted that throttle first or while kicking it, NEVER !. I always had to be careful to not activate the accelerator pump when starting that beast, it would not even burp if I touched the throttle. Leave the throttle alone, use the choke only and see if that helps (?).
Aside from that id be looking at the decompression mechanism
After that the timing & hot cams
keep up the great Vids !
Do it the Mustie way, gas straight in the cylinder. If it doesn't fire it's ignition prblm
It would take mustie 3 videos to just do that
I had a Honda that would only bump start. Turned out to be a weak magnet. Kicking it over didn’t produce enough spark but once I pulled it up to 3rd gear on a bump start, it fired immediately. Don’t try and bump it in first or second gear. Pull it right up into 3rd and pop the clutch. Do some testing on resistance and find out which ignition component is weak. Most likely not the cdi, as they usually either work or don’t. No in between. Have jade pull you on a quad or side by side lol. Or have chuck get off the squat rack and help his big brother out lol. Good luck joe
Twisting the throttle while kicking a 4stroke especially one with high compression is a sure way to damage your shin, kick back can sometimes be no joke!
Yup he’s been warned of this and also to the revving of new and cold motors lmao man is throttle happy at the wrong times, once warmed and wanting to be revved he is very light on the throttle. I don’t get the dude I really don’t but I’m still watching and hoping he progresses lol
Broke my leg with 380cc DR with manual decompressor 5 years ago.. Lesson learned from that one :D
@@allenwade8706 yeah I've noticed he likes to rev the death out of them, his motors surely can't last long, especially a rebuilt engine not even seated fully and he's bouncing the rev limiter 🤣🤣
@@allenwade8706 so how are you supposed to keep a bike running that doesnt idle without revving it ?. if a bike is bogging out and almost stalling , you have to rev it. i laugh at people who thing a bike is super fragile . hes not holding it wde open none stop. hes blipping it. but indulge me. if a bike wont idle, and you are trying to clear it out /warm it up and also set the idle without it dying how do you do that before it dies, and not rev it ?. ill take the advice from the guy that repairs about a bike a day for years and years over someone that probably owned 5 bikes at best and were all probably maintained well not barn finds or bargain deals
@@thewizardoftech5075 he's not saying to not rev it, he just revs the death out of them at the wrong times, blipping the throttle to maintain an idle and adjust is different to just starting a stone cold engine and full throttling, if you dont know this. Youve clearly never rebuilt engines, but to be fair if a bike isn't idling then it has an underlying problem to be addressed lol, we are talking about how he starts a 4 stroke and throttles it while kicking though which is a big no no
Love the channel, always a learning moment. Vinny monitoring progress, better not be dipping into Alpo budget
Thank you for watching! I appreciate it!
Teach Vin to drive the tri-sport, then have him tow ya with a strap.. it'll bark off.
First I would put the jets back in that you took out, reason being it did run there, even though you had to bump start. So i am thinking lean. When it was running and you reved it, the engine didn't return to idle crisply, it lingered before returning to idle, that usually means vacuum leak some where. Have you verified ignition timing using a timing light, check it. After trying to start was a plug pulled to see if flooding was occurring, you said you fed gas straight in, try again and pull plug. If wet then ignition problem. I don't fully under stand adjustment on the cams, but using a dial indicator you verified cam timing to TDC. Don't go by the marks do it by finding TDC then check marks. Marks could be wrong. Good luck
Thanks for this, was thinking about a 4 stroke dirtbike, i'll guess i'll keep my yz125 😂😂😂😂
I am emotionally invested now... DON'T GIVE UP YOU GOT THIS!!!!!!!!
Thank you for watching! I appreciate it!
I would suggest moving that cam timing back some and also change that pulse coil because it probably got hot when they ran it low on oil I had 1 test good but be weak and only crank with a bump on my ktm
Joe, I would check the keyway on the flywheel. Make sure it’s not sheared a little bit or totally. Definitely sounds ignition timing related. As others have said, could be CDI. As a secondary problem, when it was running, I could hear hanging idle. That is usually a lean condition. On my KLX 450. It was a dirty pilot jet. When you went from large pilot to small pilot I think that may be the wrong direction. Also, possibly air leak. As others have said, bump start it in second or third gear. Last tip, when kickstarting it put the bike on the frame stand so that you can stand on the pegs while kicking it over. you’ll get a lot more leverage on each kick and not wear yourself out as fast. Ask me how I know.
I had that issue on an old xl500
Thank you for the suggestion! I appreciate it!
I would have increased pilot, decreased main from oem sizes
Hey Joe my wr426 had spark compression and fuel ended up the resitor in the spark plug cap was reading 11ohms should be 5 ohms or less as soon as I got replacement resitor it fired up 1st kick and everytime try look inside Ur spark plug cap the resitor looks like a fuse take Ur resitor out multimeter it see how many ohms it is if it over 6 ohms then there's the problem hope that helps you
its awesome when you try to teach us when you have no clue
Check the timing. / redo the timing. Look for a short in the harness. Check the decomp spring.
I had an 01 just like that one except the headstock cams in it. I put in a high-compression piston and it would not. I contacted the manufacturer of the piston and I had to rejet it's super lean.
When you started it and blipped the throttle the idle was high. You adjusted it and it dropped but when you blipped the throttle it went high again. Or it could be a sign of too lean mixture. Maybe some leaky carb or carb-cylinder head tube has some hair crack on the rubber. I'd check the spark plug gap and the spark plug type. Perhaps it is a hotter one. Definitely checking the stock jetting for that big bore, the engine should at least run with it. I think the cam timing is correct, maybe a bit noisier but the throttle response was good. Bigger compression needs higher ignition energy to ignite the mixture. There are a lot of ways to start investigating the source of the no-start issue.
Intermittent spark
Bump start allow more crancking time than kick start.
Try a drill on the crank nut to test spark with test light for a longer test spark confirmation.
Check the cam and decompress spring. I had a 2001 yam 426 that I put the auto decompress kit in. I Had to play with the cam and like once year replace the comprs spring for some reason. Was acting the same way that one is. Love the channel. It's so cool watching other techs work and pick up tips and tricks. Your get it.
A lot of people are talking about timing. Just curious one thing to check is the key way on the crank shaft. Make sure it’s not sheared or messed up
I just made the same comment in a different reply
Wow that the first time I've seen you not get a bike started.. you are great I can't wait to see what it is keep up the great vids
Thank you for watching! I am glad that you enjoy the videos!
watching you kick that thing is making my knee hurt LOL
Did you ever figure it out? I am dealing with a very similar issue. Bought bike with a stiff crank/con rod bearing. I did a Fresh rebuild, new Pro-x crank, WIseco top end, new cylinder. Head disassembled, cleaned, inspected, measured. New valve seals and valves shimmed. Carburetor thoroughly cleaned. Problem is a no start, backfiring occasionally through the exhaust. Got it started twice after kicking forever and it ran for 1 second each time (sounded fine). Ok, gone over everything several times with a fine tooth comb, as they say. Nice crisp blue spark, swapped out the coil and cdi just to be sure that wasn't the problem. Compression is as good as new, leak down test passed as new. Checked cam timing again and again and again as well as valve clearances. Ohm tested, coil, stator, CKP sensor, kill switch, neutral switch and TPS, all good. Pulled the carb and shot fuel directly in the engine, nope. Looked at the cams to be sure that the gears hadn't spun, that's good. Checked to make sure the woodruff key was in the crank, perfect. I'm lost. Can't think of what I might be missing.
Try maybe new stator. Idk had the same problem on a 600cc Daytona 04, didn't let us bump start it. Same sound when you tried to bump start it sounded like it wanted to kick over but jus died out. Prob not the reason but maybe worth a try. Always a great time watching you rebuild engines! Keep up the great work!
You need to teach Jade how to tow you on a four-wheeler to bump start. I'd start with an OEM carb and get rid of that eBay junk. If you're like me, it's going to eat at you until you figure it out. Good luck, and thanks for the great content.
You'll get there eventually mine had a problem that happened to be the valves being to tight for it needed a similar way to start using bumpstarts and would only start kick when hot
Thanks man! I hope so! Thank you for watching!
It ran strong and crisp when it ran, the decomp spring could be the issue. Worn, overheated spring. Jetting and cam timing would be an issue running. Bumpstart bypasses the decompression system.
I can watch this guy all day. Used prices of videos on my 04 ktm105.
I have a 2004 YZ250f stock. When cold it does not like any throttle at all when starting. If you even tweek the throttle while kicking it over it will not start. But if you leave the throttle alone it will start in 1 or 2 kicks everytime. With your big bore fancy cam I doubt my advise will help much.
The decompression valve may me clogged with carbon build up, or the decompression valve spring itself may have just given out. Keep doing what you do‼👍
Thank you for watching, and thank you for the suggestion! I appreciate it!
When you bump start, put it in 2nd or 3rd gear. It will go easier. I am thinking the ignition timing is off a bit. Not sure there is a way to check that.
If you aren't already, bump start in 2nd gear, it'll turn over on the gravel drive...
Try 2nd or 3rd gear when bump starting. Maybe timming on Hot cam is wrong. It looked liked it was all the way advanced.
Im not really into 4 stroke dirt bikes but that intake cam looks to be adjusted as late as possible.
Good call.
I was thinking the same, but I'm a 2 stroke guy
Really like your videos, but isnt it better to wash the bikes before you start working on it ?
Yes lol
Bruh where is the dirt..
Those old 4 strokes are super specific to start! Great find!
Thank you for watching!
That intake side cam is out. It's fully clocked.
Still waiting on that Goldwing to fly down the road my friend 😊🇺🇸good job on the yammy don’t give up!!! Bump start it in 4th gear
May try a new coil? May have the spark, but not enough current. I’m a electrician by trade. I’ve seen this happen on one of my bikes. Hoosier Wing🇺🇸👍🏻⭐️
1 - Reset the carb to all original jets to have a good starting point. Check the seals on the choke and the hot start plungers. Check the slide aswell. Run the bike and spray on the carb some brake cleaner to check for air leaks.
2 - Check the timming of the intake cam. Maybe its a litle off, but it looked correct to me.
3 - Check the tps condition and position. On the wrong position it will mess with the timming.
5 - To kick start this bike is much easier, if not only possible if you turn until the decompression makes a click. Kick the bike on this position.
6 - Good luck and take your time.
Thank you for the suggestion! I appreciate it!
Being that it has a bigger bore and piston kit, many big bore bikes that I owned 450cc 500ect when they didnt start' I layed the bike down and flooded the carburetor for a brief moment. Then they started a couple of kicks. Maybe it's a fuelling issue' was the plug wet when removed. Keep at it, love the content.😂
Thank you for the suggestion! I am glad that you enjoyed the video!
Try. Checking the stator coils resistance. I’ve had it where one coil is dead but you still get a nice fat spark but under compression not great.
I find the absolute best thing to do when a bike acts just like this one is to kick it to the ground put it into a corner for a week then revisit it when it’s smartened up
That is sometimes the best thing to do! Thank you for watching!
Mayve you could explain the hot cam concept, thats new to me. Why would you want it?, and how to adjust em. Thanks.
I've never seen you not start a motorcycle. It's ok don't worry be happy
Ring gap to small to high of compression. Big drag bikes use a big drill to start high compression motors. It was running so everything works it just takes more rotations to fire, or maybe there's gremlins in the carb. Super stumped if it's not either of those. Just for safety don't give it any gas after midnight.
My old 2001 yz250f had a decompression lever. Where you had to pull and kick before you released it and gave it a real kick. Started every time but only if you used that decompression lever. But you could get it to bump start without it. Maybe that’s the issue, also had a weird hott start deal. Not sure it that could effect anything either.
Thank you for the suggestion!
I rebuilt alot of yfz450 crf450r trx450r kfx700 all started right up good luck
Try putting the 48 pilot back in and let it warm up. Once it's warm, use the choke and hot start to determine what way to jet. Higher rev with choke, up the pilot size. Higher with hot start, lower the size. It may be worth picking up a stock used cam to put in place of the adjustable intake cam. You can try turning up the idle when starting it to get it started, then down once it starts to tune it in. Just a few thoughts.
Usually, 1 jet size at a time will help to pinpoint the jetting. I have a feeling it's a 45 or a 50.
Thank you for the suggestion!
The old four strokes are a pain in the ass to start if you don’t ride it everyday.
I'm a new subscriber.....I'd love to see a bike being fully detailed. Like a good washing, steam cleaning. Possibly powder coating a frame or two.
Just here for the "you didn't wash the bike" comments. They're my favorite.
Why would not wash it before you start working on it why take the chance of getting dirt in the crank
@@ravioli9728 Exactly!!! Makes no sense.
@@ravioli9728 the bike is clean enough for him to work on it. He’s just trying to fix it and flip it for a profit so whatever happens to it after he sells it because he didn’t clean it isn’t his problem
@@cass8144 ok but who cares if you are flipping it. if somebody buys it with their hard earned money I'm sure they don't want chunks of dirt in the crank because someone didn't want to take 10 minutes and wash it.
@@ravioli9728 he may have just pressure washed it off camera and the bike just has dirt stains on it.
If she did not pop over on starting fluid, it's a pretty safe bet the problems within the ignition system.
You never skip leg day when owning a 4 stroke dirt bike. Just miserable! lol
Not if you have electric start.
Just completely rebuilt a yfz450 while doing so went ahead and for what I thought was a good idea I put a Chinese carb on it would not stay running or start consistently to save my lift. Had the oem Kehin rebuilt for same price as Chinese carb and started and ran instantly no problems after that
04 yfz450 to be exact so very similar to this bike
Very reminiscent of my XT500. I gave up after tearing motor down multiple times. It’s something with the carb. The guy I gave it to took it to Yamaha shop and they discovered a screw missing in the throttle body. I did not notice it and it ran great after that. So check vacuum leak or wrong carb.
I’ve been there.
Thank you for the suggestion! I appreciate it!
Chin up Mr. You took on a tough project with many variables.
There's only one way to test one's skills.
The Best
I had a buddy build one of these and he had to use higher octane fuel in it to get it to run correctly
interesting, mine prefers non-oxygenated / non-ethanol
So I’ve rebuilt the 400f version of this bike using the same carb. I replaced it with an OEM carb with the same exact size jets and it fires up. Idk if it was the carb or what but definitely try the oem keihin carb with the oem jetting and you should be good
With it having a hot cam and its adjustable. Could that be where it's not degreed just right? . Idk not a 4 stroke guy lol . Good luck post when you do find the issue I am curious now .
Compression is ok judging by bump start trouble.
When cold you want it to be rich so smaller jets are no use.
Big bore kits use more air so bigger jets are required I would have thought.
Keep in mind emulsion tube stabilises mixture as vacuum increases.
It runs when bumped ok.
Carb is the issue, it's not fuelling at low rpm when kicked.
Starter fluid will prove this although accelerator pump works you say?
Give it loads of pumps?
Substitute the carb for another.
Been patiently awaiting this Joe.. Good job
Frustrating for sure. One positive is your right leg is a monster. I wonder what Vinnie thinks??? He usually has the correct solution. Can't wait and see the end result. Great rebuild
Haha Vinnie usually has all of the answers! Thank you for watching and commenting! I appreciate it!
When life give you a lemon 🍋 you make lemonade 😅
Soon as you pulled that side cover off I said to myself "I be damn, that kinda looks like a Hinson clutch" can't believe I was actually right tho 😂 lol...seems like you've found another nice bike!! Saying this as your replacing the piston so hopefully after rebuild im right about that haha
And of course I spoke to soon but im sure you will figure this out. Taking a break on it always helps for me in bad situations but I've got faith in ya my man wish I had some good advice but im lost as well rn
Thank you for watching and commenting! I appreciate it!
I've seen this before it was an issue with the stator voltage. I would check that.
Thank you for the suggestion!
Time for a 450 dirtbike my friend!!
Check your exhaust , had a CR 500 just a pain to start discovered a big mouse nest in the pipe .
I've had that after sitting in the storage shed for the winter
Thank you for the suggestion!
Have you tried starting with exhaust off might be blocked 🤷♂️ there was no smoke coming out the pipe when kicking it over also could valve timing maybe 180 out
When you bump start, run way faster then when you pop the clutch jump down on the seat to get traction and give it gas, I have a 03 yz450f and those are the tricks to get these stubborn things to start.
I had one like that a couple years ago and it turned out to be an intermittent kill switch. Pulled it and it started every time.
I think you need clean the carburetor inside really good
I think ya flooded it before it started bud. I've got a yz426f with the same carb and it takes 2 pumps of the throttle and it fires right up. Any more and it floods. Ya gotta kick it till it backfires, give it 2 pumps and try again. Any less and it'll stumble a sec and die or not fire at all.
What's that in the background, is it a Toyota land cruiser?
Man, I bet that things a champ for hauling decorative wood. lol
even Vinny was confused, lol
My guess is the cdi. That or that carburetor. May need an oem.
I bet that piston is still hitting the head just as it did with the old piston, that's why the piston was clean around the outer edge and why it was so hard to kick over. When you had it running it sounded terrible.
Joe.remeber the xt 500. Don't touch the go go until it fires.just my experience with thumpers.cheers mate.
Bro I have the same bike no it’s a hard bike to start don’t never hit the gas and the little pull button near the clutch pull that in when the bike not starting it helps it start it’s called a hot start
I'd like to see his method of keeping track of bolts. A lot of those are different lengths and putting them back in the wrong spot is obviously not good. I typically use a piece of cardboard and draw the layout of what i'm disassembling.
When joe uses that 1/2 impact with a 3/8 adapter to 1/4 adapter to 8mm it makes my stomach turn
weak spark until the rpms are up, possible ignition stator coil gone bad, check the manual specs on the coil resistance and insulation check to ground as well.
I notice you never try spraying starting fluid directly into the engine from the spark plug hole. This is how I mainly use starting fluid and it works quite well.